Add support for experimental xx_foreign_toplevel_geometry_tracker_v1 (#1)

Co-authored-by: entailz <entail-wraps0r@icloud.com>
Reviewed-on: wry/wry#1
Co-authored-by: entailz <entailzwrapped@proton.me>
Co-committed-by: entailz <entailzwrapped@proton.me>

wire/xx_foreign_toplevel_geometry_tracker_v1.txt

@@ -0,0 +1,16 @@
+request destroy (destructor) {
+}
+
+event finished {
+}
+
+event done {
+}
+
+event geometry {
+    output: u32,
+    x: i32,
+    y: i32,
+    width: u32,
+    height: u32,
+}

wire/xx_foreign_toplevel_geometry_tracking_manager_v1.txt

@@ -0,0 +1,7 @@
+request destroy (destructor) {
+}
+
+request get_geometry_tracker {
+    tracker: id(xx_foreign_toplevel_geometry_tracker_v1) (new),
+    toplevel: id(ext_foreign_toplevel_handle_v1),
+}